99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
// sherpa-onnx/csrc/online-transducer-model.cc
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//
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// Copyright (c) 2023 Xiaomi Corporation
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#include "sherpa-onnx/csrc/online-transducer-model.h"
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#if __ANDROID_API__ >= 9
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#include "android/asset_manager.h"
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#include "android/asset_manager_jni.h"
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#endif
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#include <memory>
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#include <sstream>
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#include <string>
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#include "sherpa-onnx/csrc/online-lstm-transducer-model.h"
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#include "sherpa-onnx/csrc/online-zipformer-transducer-model.h"
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#include "sherpa-onnx/csrc/onnx-utils.h"
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namespace sherpa_onnx {
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enum class ModelType {
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kLstm,
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kZipformer,
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kUnkown,
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};
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static ModelType GetModelType(char *model_data, size_t model_data_length,
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bool debug) {
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Ort::Env env(ORT_LOGGING_LEVEL_WARNING);
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Ort::SessionOptions sess_opts;
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auto sess = std::make_unique<Ort::Session>(env, model_data, model_data_length,
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sess_opts);
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Ort::ModelMetadata meta_data = sess->GetModelMetadata();
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if (debug) {
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std::ostringstream os;
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PrintModelMetadata(os, meta_data);
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fprintf(stderr, "%s\n", os.str().c_str());
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}
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Ort::AllocatorWithDefaultOptions allocator;
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auto model_type =
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meta_data.LookupCustomMetadataMapAllocated("model_type", allocator);
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if (!model_type) {
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fprintf(stderr, "No model_type in the metadata!\n");
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return ModelType::kUnkown;
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}
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if (model_type.get() == std::string("lstm")) {
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return ModelType::kLstm;
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} else if (model_type.get() == std::string("zipformer")) {
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return ModelType::kZipformer;
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} else {
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fprintf(stderr, "Unsupported model_type: %s\n", model_type.get());
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return ModelType::kUnkown;
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}
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}
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std::unique_ptr<OnlineTransducerModel> OnlineTransducerModel::Create(
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const OnlineTransducerModelConfig &config) {
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auto buffer = ReadFile(config.encoder_filename);
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auto model_type = GetModelType(buffer.data(), buffer.size(), config.debug);
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switch (model_type) {
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case ModelType::kLstm:
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return std::make_unique<OnlineLstmTransducerModel>(config);
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case ModelType::kZipformer:
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return std::make_unique<OnlineZipformerTransducerModel>(config);
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case ModelType::kUnkown:
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return nullptr;
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}
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// unreachable code
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return nullptr;
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}
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#if __ANDROID_API__ >= 9
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std::unique_ptr<OnlineTransducerModel> OnlineTransducerModel::Create(
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AAssetManager *mgr, const OnlineTransducerModelConfig &config) {
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auto buffer = ReadFile(mgr, config.encoder_filename);
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auto model_type = GetModelType(buffer.data(), buffer.size(), config.debug);
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switch (model_type) {
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case ModelType::kLstm:
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return std::make_unique<OnlineLstmTransducerModel>(mgr, config);
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case ModelType::kZipformer:
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return std::make_unique<OnlineZipformerTransducerModel>(mgr, config);
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case ModelType::kUnkown:
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return nullptr;
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}
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// unreachable code
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return nullptr;
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}
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#endif
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} // namespace sherpa_onnx
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